Is the New “Demon Slayer” Movie the Best Anime Film of the Year?

Director: Haruo Sotozaki

Writer: Based on the original manga by Koyoharu Gotouge

Japanese Voice Cast: Natsuki Hanae as Tanjiro Kamado, Akari Kitō as Nezuko Kamado, Hiro Shimono as Zenitsu Agatsuma, Yoshitsugu Matsuoka as Inosuke Hashibira, Takahiro Sakurai as Giyu Tomioka, Saori Hayami as Shinobu Kocho, Kana Hanazawa as Mitsuri Kanroji, Asked me kira Ishida as Akaza, Toshihiko Seki as Muzan Kibutsuji.

Run Time: 2 hours 35 minutes

Rating: R

Where to watch: In Theaters

Release date: September 12th, 2025 (US release)

Stepping back into the world of Demon Slayer for two hours and thirty-five minutes inside the Infinity Castle reminded me exactly why I became a fan. It’s been a while since I last checked in on Tanjiro and company. Still, the series’ trademark blend of eye-popping color, layered character arc, and action comes roaring back in Demon Slayer: Kimetsu no Yaiba – Infinity Castle (Sub). The film adapts the climactic arc of Koyoharu Gotouge’s manga in a sprawling, shape-shifting showdown that’s equal parts nightmare and spectacle.

A Final Battle That’s Bigger Than a Location

“Infinity Castle” is pretty much the endgame here. In the manga, the Infinity Castle Arc and the Sunrise Countdown Arc form the grand finale. Muzan Kibutsuji, Demons of all demons, uses Nakime’s Blood Demon Art to drag the entire Demon Slayer Corps into a dimension-bending fortress. Rooms tilt, corridors extend, and doors appear and vanish in an instant. The castle itself becomes a living, breathing antagonist, one that laughs at logic and warps the strategies of every fighter who enters.

Director Haruo Sotozaki and the team at Ufotable treat the fortress like a character of its own. Floors fold, walls collapse, and sudden drops turn the screen into an Escher-like fever dream. At times, the animation practically pulses to the beat of Yuki Kajiura and Go Shiina’s thunderous score, keeping the audience off balance, which is a good thing. 

Who’s in the Fight

Every fan-favorite demon slayer shows up, and the film takes time to honor each of them. Tanjiro Kamado—the ever-resilient protagonist—and stoic Water Hashira Giyu Tomioka share top billing, battling their way through endless hallways toward Muzan. Love Hashira Mitsuri Kanroji and Serpent Hashira Obanai Iguro fight side by side in graceful melee sequences. Gyomei Himejima, the towering Stone Hashira, delivers a display of raw power that can feel like it rattles the theater speakers. And yes, the beloved boar-headed brawler Inosuke Hashibira charges in, swords and bravado at full tilt. His big personality is evident despite the limited time he has on screen. 

Elsewhere, Shinobu Kocho faces her own Upper Rank nightmare—trust me, it’s brutal and really tests her mentally. Meanwhile, the ever-anxious Zenitsu Agatsuma finally shows why his lightning style is not just flashy, but insanely satisfying to watch. Fans get a treat as his story collides with his former senior, Kaigaku, now the newly appointed Upper Rank Six, making their battle personal, intense, and electric. Zenitsu even throws in a few surprises that keep the fight unpredictable and exciting.

The Demon Hierarchy

On the villain side, the stakes climb with every encounter. Muzan stays the ultimate puppet master, but his lieutenants—the Twelve Kizuki—deliver the night’s most ferocious set pieces. Upper Rank One Kokushibo, a fallen Demon Slayer turned demon swordsman, has limited screen time, yet proves why he’s the second most dangerous demon and a catalyst for others. Upper Rank Two Doma chills the screen with ice-based attacks and a disturbingly cheerful nihilism. And Nakime, the silent manipulator of the castle itself, provides the film’s most ingenious obstacle, not through direct combat, but by rearranging reality beneath the slayers’ feet.

A standout for me is Akaza, the Upper Rank Three demon who faces Tanjiro and Giyu in a duel that keeps unfolding in ever more impressive ways. Akaza is the franchise’s most compelling villain here: a tragic blend of honor and brutality, the kind of character I can already see becoming a fan favorite.

Action, Animation, and a Living Soundscape

Ufotable has long set the standard for high-definition swordplay, but Infinity Castle takes it even further. The camera glides like a phantom—slipping between fighters, tracking blades that slice through black voids illuminated by bursts of neon. Every special move feels almost tangible, and I kept thinking how incredible this would be in 4DX. The castle’s constant shape-shifting forces inventive choreography: warriors spring off collapsing walls or launch themselves across vanishing floors.

The score is just as spectacular. A low taiko-drum thrum signals ambushes, while other instruments swell when a Hashira unleashes a new technique. It’s the perfect complement to the action. During the biggest clashes, the theater erupted, with the sound design acting like a conductor, cueing cheers and gasps as each character powered up or landed a finishing blow.

Story and Pacing

At 2 hours and 35 minutes, Infinity Castle is one of the longer anime films I’ve seen in theaters recently, but it rarely drags. Like most anime, it pauses for flashbacks and origin stories, giving the story room to breathe. The narrative shifts between intense action and these quieter moments, which deepen the emotional stakes, especially for the demons themselves. In my opinion, this has always been Demon Slayer’s secret weapon: even the villains have histories that are deeply moving.

 

Performances and Fan Service

The Japanese voice cast is absolutely on point. Natsuki Hanae gives Tanjiro a quiet determination, while Hiro Shimono’s Zenitsu perfectly balances panic with moments of surprising confidence. Akira Ishida brings Akaza to life with a tragic, driven intensity.

And yes, the messenger crows are a delight, perfectly timed comic relief I didn’t realize I needed until I heard a theater full of fans laughing along with me.

For longtime viewers, the film delivers fan service that actually fulfills. Every Hashira gets their moment, every grudge finds its arena, and when the final clash kicks off, you can feel the excitement in the theater.

Conclusion

Demon Slayer: Kimetsu no Yaiba – Infinity Castle is an emotional and visual marvel. It captures what makes the franchise special: dazzling animation, heartbreaking backstories, and battles that feel both mythic and personal. Imagine Inception’s gravity-bending hallways fused with the emotional stakes of Fullmetal Alchemist: Brotherhood, all wrapped in Ufotable’s signature glow. For fans, it’s an unmissable theatrical event. For newcomers, it’s proof that anime blockbusters can rival —and often outshine —the biggest Hollywood spectacles. By the time Tanjiro and Giyu face Akaza in the film’s climactic duel, you’ll understand why Demon Slayer continues to dominate the global conversation and might be the best anime film of the year. I give this film an 8/10 and recommend you watch it this weekend. Grab your ticket, bring some friends, and get ready for a castle that truly lives up to its name.